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718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
e52702f2 | 19 | * 02111-1307, USA. |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
8ccc7e80 | 23 | #include <net/if_arp.h> |
718e3744 | 24 | |
25 | /* Hack for GNU libc version 2. */ | |
26 | #ifndef MSG_TRUNC | |
27 | #define MSG_TRUNC 0x20 | |
28 | #endif /* MSG_TRUNC */ | |
29 | ||
30 | #include "linklist.h" | |
31 | #include "if.h" | |
32 | #include "log.h" | |
33 | #include "prefix.h" | |
34 | #include "connected.h" | |
35 | #include "table.h" | |
26e2ae36 | 36 | #include "memory.h" |
4a1ab8e4 | 37 | #include "zebra_memory.h" |
718e3744 | 38 | #include "rib.h" |
e04ab74d | 39 | #include "thread.h" |
edd7c245 | 40 | #include "privs.h" |
fb018d25 | 41 | #include "nexthop.h" |
78104b9b | 42 | #include "vrf.h" |
5e6a74d8 | 43 | #include "vty.h" |
40c7bdb0 | 44 | #include "mpls.h" |
718e3744 | 45 | |
46 | #include "zebra/zserv.h" | |
fe18ee2d | 47 | #include "zebra/zebra_ns.h" |
7c551956 | 48 | #include "zebra/zebra_vrf.h" |
6621ca86 | 49 | #include "zebra/rt.h" |
718e3744 | 50 | #include "zebra/redistribute.h" |
51 | #include "zebra/interface.h" | |
52 | #include "zebra/debug.h" | |
12f6fb97 | 53 | #include "zebra/rtadv.h" |
567b877d | 54 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 55 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 56 | #include "zebra/kernel_netlink.h" |
57 | #include "zebra/rt_netlink.h" | |
e3be0432 DS |
58 | #include "zebra/zebra_mroute.h" |
59 | ||
7021c425 | 60 | |
40c7bdb0 | 61 | /* TODO - Temporary definitions, need to refine. */ |
62 | #ifndef AF_MPLS | |
63 | #define AF_MPLS 28 | |
64 | #endif | |
65 | ||
66 | #ifndef RTA_VIA | |
c0f4be83 | 67 | #define RTA_VIA 18 |
40c7bdb0 | 68 | #endif |
69 | ||
70 | #ifndef RTA_NEWDST | |
71 | #define RTA_NEWDST 19 | |
72 | #endif | |
c0f4be83 | 73 | |
74 | #ifndef RTA_ENCAP_TYPE | |
75 | #define RTA_ENCAP_TYPE 21 | |
76 | #endif | |
77 | ||
78 | #ifndef RTA_ENCAP | |
79 | #define RTA_ENCAP 22 | |
80 | #endif | |
81 | ||
113db945 DS |
82 | #ifndef RTA_EXPIRES |
83 | #define RTA_EXPIRES 23 | |
84 | #endif | |
85 | ||
c0f4be83 | 86 | #ifndef LWTUNNEL_ENCAP_MPLS |
87 | #define LWTUNNEL_ENCAP_MPLS 1 | |
88 | #endif | |
89 | ||
90 | #ifndef MPLS_IPTUNNEL_DST | |
91 | #define MPLS_IPTUNNEL_DST 1 | |
92 | #endif | |
52d8f0d8 DS |
93 | |
94 | #ifndef NDA_MASTER | |
95 | #define NDA_MASTER 9 | |
96 | #endif | |
40c7bdb0 | 97 | /* End of temporary definitions */ |
98 | ||
99 | struct gw_family_t | |
100 | { | |
101 | u_int16_t filler; | |
102 | u_int16_t family; | |
103 | union g_addr gate; | |
104 | }; | |
105 | ||
23b1f334 DD |
106 | static inline int is_selfroute(int proto) |
107 | { | |
108 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) || | |
109 | (proto == RTPROT_STATIC) || (proto == RTPROT_ZEBRA) || | |
110 | (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG)) { | |
111 | return 1; | |
112 | } | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | static inline int get_rt_proto(int proto) | |
118 | { | |
119 | switch (proto) { | |
120 | case ZEBRA_ROUTE_BGP: | |
121 | proto = RTPROT_BGP; | |
122 | break; | |
123 | case ZEBRA_ROUTE_OSPF: | |
124 | case ZEBRA_ROUTE_OSPF6: | |
125 | proto = RTPROT_OSPF; | |
126 | break; | |
127 | case ZEBRA_ROUTE_STATIC: | |
128 | proto = RTPROT_STATIC; | |
129 | break; | |
130 | case ZEBRA_ROUTE_ISIS: | |
131 | proto = RTPROT_ISIS; | |
132 | break; | |
133 | case ZEBRA_ROUTE_RIP: | |
134 | proto = RTPROT_RIP; | |
135 | break; | |
136 | case ZEBRA_ROUTE_RIPNG: | |
137 | proto = RTPROT_RIPNG; | |
138 | break; | |
139 | default: | |
140 | proto = RTPROT_ZEBRA; | |
141 | break; | |
142 | } | |
143 | ||
144 | return proto; | |
145 | } | |
146 | ||
12f6fb97 DS |
147 | /* |
148 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
149 | */ | |
150 | static vrf_id_t | |
151 | vrf_lookup_by_table (u_int32_t table_id) | |
152 | { | |
1a1a7065 | 153 | struct vrf *vrf; |
12f6fb97 | 154 | struct zebra_vrf *zvrf; |
12f6fb97 | 155 | |
1a1a7065 | 156 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
12f6fb97 | 157 | { |
1a1a7065 | 158 | if ((zvrf = vrf->info) == NULL || |
12f6fb97 DS |
159 | (zvrf->table_id != table_id)) |
160 | continue; | |
161 | ||
661512bf | 162 | return zvrf_id (zvrf); |
12f6fb97 DS |
163 | } |
164 | ||
165 | return VRF_DEFAULT; | |
166 | } | |
167 | ||
718e3744 | 168 | /* Looking up routing table by netlink interface. */ |
6072b24e | 169 | static int |
89a9069a DS |
170 | netlink_route_change_read_unicast (struct sockaddr_nl *snl, struct nlmsghdr *h, |
171 | ns_id_t ns_id, int startup) | |
718e3744 | 172 | { |
173 | int len; | |
174 | struct rtmsg *rtm; | |
7021c425 | 175 | struct rtattr *tb[RTA_MAX + 1]; |
718e3744 | 176 | u_char flags = 0; |
3b1098be | 177 | struct prefix p; |
05737783 | 178 | struct prefix_ipv6 src_p; |
d552ed06 | 179 | vrf_id_t vrf_id = VRF_DEFAULT; |
7021c425 | 180 | |
181 | char anyaddr[16] = { 0 }; | |
718e3744 | 182 | |
05737783 | 183 | int index = 0; |
718e3744 | 184 | int table; |
05737783 | 185 | int metric = 0; |
c50ca33a | 186 | u_int32_t mtu = 0; |
34195bf6 | 187 | |
05737783 CF |
188 | void *dest = NULL; |
189 | void *gate = NULL; | |
190 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
191 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
718e3744 | 192 | |
193 | rtm = NLMSG_DATA (h); | |
194 | ||
89a9069a | 195 | if (startup && h->nlmsg_type != RTM_NEWROUTE) |
718e3744 | 196 | return 0; |
89a9069a | 197 | if (startup && rtm->rtm_type != RTN_UNICAST) |
718e3744 | 198 | return 0; |
199 | ||
7021c425 | 200 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); |
718e3744 | 201 | if (len < 0) |
202 | return -1; | |
203 | ||
204 | memset (tb, 0, sizeof tb); | |
205 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); | |
206 | ||
207 | if (rtm->rtm_flags & RTM_F_CLONED) | |
208 | return 0; | |
209 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
210 | return 0; | |
211 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
212 | return 0; | |
213 | ||
89a9069a | 214 | if (!startup && |
23b1f334 | 215 | is_selfroute (rtm->rtm_protocol) && |
89a9069a DS |
216 | h->nlmsg_type == RTM_NEWROUTE) |
217 | return 0; | |
218 | ||
40c7bdb0 | 219 | /* We don't care about change notifications for the MPLS table. */ |
220 | /* TODO: Revisit this. */ | |
221 | if (rtm->rtm_family == AF_MPLS) | |
222 | return 0; | |
223 | ||
ca46a78e | 224 | /* Table corresponding to route. */ |
225 | if (tb[RTA_TABLE]) | |
226 | table = *(int *) RTA_DATA (tb[RTA_TABLE]); | |
227 | else | |
228 | table = rtm->rtm_table; | |
229 | ||
230 | /* Map to VRF */ | |
231 | vrf_id = vrf_lookup_by_table(table); | |
232 | if (vrf_id == VRF_DEFAULT) | |
233 | { | |
234 | if (!is_zebra_valid_kernel_table(table) && | |
235 | !is_zebra_main_routing_table(table)) | |
236 | return 0; | |
237 | } | |
238 | ||
718e3744 | 239 | /* Route which inserted by Zebra. */ |
23b1f334 | 240 | if (is_selfroute(rtm->rtm_protocol)) |
718e3744 | 241 | flags |= ZEBRA_FLAG_SELFROUTE; |
7021c425 | 242 | |
718e3744 | 243 | if (tb[RTA_OIF]) |
244 | index = *(int *) RTA_DATA (tb[RTA_OIF]); | |
245 | ||
246 | if (tb[RTA_DST]) | |
247 | dest = RTA_DATA (tb[RTA_DST]); | |
248 | else | |
249 | dest = anyaddr; | |
250 | ||
05737783 CF |
251 | if (tb[RTA_SRC]) |
252 | src = RTA_DATA (tb[RTA_SRC]); | |
253 | else | |
254 | src = anyaddr; | |
255 | ||
7514fb77 | 256 | if (tb[RTA_PREFSRC]) |
05737783 | 257 | prefsrc = RTA_DATA (tb[RTA_PREFSRC]); |
7514fb77 | 258 | |
718e3744 | 259 | if (tb[RTA_GATEWAY]) |
260 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
261 | ||
c50ca33a TT |
262 | if (h->nlmsg_type == RTM_NEWROUTE) |
263 | { | |
264 | if (tb[RTA_PRIORITY]) | |
265 | metric = *(int *) RTA_DATA(tb[RTA_PRIORITY]); | |
266 | ||
267 | if (tb[RTA_METRICS]) | |
268 | { | |
269 | struct rtattr *mxrta[RTAX_MAX+1]; | |
270 | ||
271 | memset (mxrta, 0, sizeof mxrta); | |
272 | netlink_parse_rtattr (mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), | |
273 | RTA_PAYLOAD(tb[RTA_METRICS])); | |
274 | ||
275 | if (mxrta[RTAX_MTU]) | |
276 | mtu = *(u_int32_t *) RTA_DATA(mxrta[RTAX_MTU]); | |
277 | } | |
278 | } | |
26e2ae36 | 279 | |
718e3744 | 280 | if (rtm->rtm_family == AF_INET) |
281 | { | |
718e3744 | 282 | p.family = AF_INET; |
616368ed | 283 | memcpy (&p.u.prefix4, dest, 4); |
718e3744 | 284 | p.prefixlen = rtm->rtm_dst_len; |
a2ca67d1 DS |
285 | } |
286 | else if (rtm->rtm_family == AF_INET6) | |
287 | { | |
288 | p.family = AF_INET6; | |
289 | memcpy (&p.u.prefix6, dest, 16); | |
290 | p.prefixlen = rtm->rtm_dst_len; | |
718e3744 | 291 | |
a2ca67d1 DS |
292 | src_p.family = AF_INET6; |
293 | memcpy (&src_p.prefix, src, 16); | |
294 | src_p.prefixlen = rtm->rtm_src_len; | |
295 | } | |
05737783 | 296 | |
a2ca67d1 DS |
297 | if (rtm->rtm_src_len != 0) |
298 | { | |
299 | char buf[PREFIX_STRLEN]; | |
300 | zlog_warn ("unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
301 | prefix2str (&p, buf, sizeof(buf)), vrf_id); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | if (IS_ZEBRA_DEBUG_KERNEL) | |
306 | { | |
307 | char buf[PREFIX_STRLEN]; | |
308 | char buf2[PREFIX_STRLEN]; | |
309 | zlog_debug ("%s %s%s%s vrf %u", | |
310 | nl_msg_type_to_str (h->nlmsg_type), | |
311 | prefix2str (&p, buf, sizeof(buf)), | |
312 | src_p.prefixlen ? " from " : "", | |
313 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) : "", | |
314 | vrf_id); | |
315 | } | |
718e3744 | 316 | |
a2ca67d1 DS |
317 | afi_t afi = AFI_IP; |
318 | if (rtm->rtm_family == AF_INET6) | |
319 | afi = AFI_IP6; | |
320 | ||
321 | if (h->nlmsg_type == RTM_NEWROUTE) | |
322 | { | |
323 | if (!tb[RTA_MULTIPATH]) | |
324 | rib_add (afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL, | |
325 | 0, flags, &p, NULL, gate, prefsrc, index, | |
326 | table, metric, mtu, 0); | |
327 | else | |
26e2ae36 | 328 | { |
a2ca67d1 DS |
329 | /* This is a multipath route */ |
330 | ||
331 | struct rib *rib; | |
332 | struct rtnexthop *rtnh = | |
333 | (struct rtnexthop *) RTA_DATA (tb[RTA_MULTIPATH]); | |
334 | ||
335 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
336 | ||
337 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); | |
338 | rib->type = ZEBRA_ROUTE_KERNEL; | |
339 | rib->distance = 0; | |
340 | rib->flags = flags; | |
341 | rib->metric = metric; | |
342 | rib->mtu = mtu; | |
343 | rib->vrf_id = vrf_id; | |
344 | rib->table = table; | |
345 | rib->nexthop_num = 0; | |
346 | rib->uptime = time (NULL); | |
347 | ||
348 | for (;;) | |
26e2ae36 | 349 | { |
a2ca67d1 DS |
350 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) |
351 | break; | |
26e2ae36 | 352 | |
a2ca67d1 DS |
353 | index = rtnh->rtnh_ifindex; |
354 | gate = 0; | |
355 | if (rtnh->rtnh_len > sizeof (*rtnh)) | |
356 | { | |
357 | memset (tb, 0, sizeof (tb)); | |
358 | netlink_parse_rtattr (tb, RTA_MAX, RTNH_DATA (rtnh), | |
359 | rtnh->rtnh_len - sizeof (*rtnh)); | |
360 | if (tb[RTA_GATEWAY]) | |
361 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
362 | } | |
26e2ae36 | 363 | |
a2ca67d1 DS |
364 | if (gate) |
365 | { | |
366 | if (rtm->rtm_family == AF_INET) | |
26e2ae36 JB |
367 | { |
368 | if (index) | |
05737783 | 369 | rib_nexthop_ipv4_ifindex_add (rib, gate, prefsrc, index); |
26e2ae36 | 370 | else |
05737783 | 371 | rib_nexthop_ipv4_add (rib, gate, prefsrc); |
26e2ae36 | 372 | } |
a2ca67d1 DS |
373 | else if (rtm->rtm_family == AF_INET6) |
374 | { | |
375 | if (index) | |
376 | rib_nexthop_ipv6_ifindex_add (rib, gate, index); | |
377 | else | |
378 | rib_nexthop_ipv6_add (rib,gate); | |
379 | } | |
1fdc9eae | 380 | } |
1fdc9eae | 381 | else |
a2ca67d1 | 382 | rib_nexthop_ifindex_add (rib, index); |
26e2ae36 | 383 | |
a2ca67d1 DS |
384 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
385 | rtnh = RTNH_NEXT(rtnh); | |
386 | } | |
05737783 | 387 | |
a2ca67d1 DS |
388 | zserv_nexthop_num_warn(__func__, (const struct prefix *)&p, |
389 | rib->nexthop_num); | |
390 | if (rib->nexthop_num == 0) | |
391 | XFREE (MTYPE_RIB, rib); | |
392 | else | |
393 | rib_add_multipath (AFI_IP, SAFI_UNICAST, &p, NULL, rib); | |
7021c425 | 394 | } |
718e3744 | 395 | } |
a2ca67d1 | 396 | else |
2f8685a2 DS |
397 | { |
398 | if (!tb[RTA_MULTIPATH]) | |
399 | rib_delete (afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL, 0, flags, | |
400 | &p, NULL, gate, index, table); | |
401 | else | |
402 | { | |
403 | struct rtnexthop *rtnh = | |
404 | (struct rtnexthop *) RTA_DATA (tb[RTA_MULTIPATH]); | |
405 | ||
406 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
407 | ||
408 | for (;;) | |
409 | { | |
410 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) | |
411 | break; | |
412 | ||
413 | gate = NULL; | |
414 | if (rtnh->rtnh_len > sizeof (*rtnh)) | |
415 | { | |
416 | memset (tb, 0, sizeof (tb)); | |
417 | netlink_parse_rtattr (tb, RTA_MAX, RTNH_DATA (rtnh), | |
418 | rtnh->rtnh_len - sizeof (*rtnh)); | |
419 | if (tb[RTA_GATEWAY]) | |
420 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
421 | } | |
422 | ||
423 | if (gate) | |
424 | rib_delete (afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL, 0, flags, | |
425 | &p, NULL, gate, index, table); | |
426 | ||
427 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
428 | rtnh = RTNH_NEXT(rtnh); | |
429 | } | |
430 | } | |
431 | } | |
718e3744 | 432 | |
433 | return 0; | |
434 | } | |
435 | ||
e3be0432 DS |
436 | static struct mcast_route_data *mroute = NULL; |
437 | ||
565fdc75 DS |
438 | static int |
439 | netlink_route_change_read_multicast (struct sockaddr_nl *snl, struct nlmsghdr *h, | |
936ebf0a | 440 | ns_id_t ns_id, int startup) |
565fdc75 DS |
441 | { |
442 | int len; | |
443 | struct rtmsg *rtm; | |
444 | struct rtattr *tb[RTA_MAX + 1]; | |
e3be0432 DS |
445 | struct mcast_route_data *m; |
446 | struct mcast_route_data mr; | |
90d82769 DS |
447 | int iif = 0; |
448 | int count; | |
449 | int oif[256]; | |
450 | int oif_count = 0; | |
451 | char sbuf[40]; | |
452 | char gbuf[40]; | |
453 | char oif_list[256] = "\0"; | |
90d82769 | 454 | vrf_id_t vrf = ns_id; |
565fdc75 | 455 | |
e3be0432 DS |
456 | if (mroute) |
457 | m = mroute; | |
458 | else | |
f0242f68 DS |
459 | { |
460 | memset (&mr, 0, sizeof (mr)); | |
461 | m = &mr; | |
462 | } | |
e3be0432 | 463 | |
565fdc75 DS |
464 | rtm = NLMSG_DATA (h); |
465 | ||
466 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); | |
467 | ||
468 | memset (tb, 0, sizeof tb); | |
469 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); | |
470 | ||
90d82769 DS |
471 | if (tb[RTA_IIF]) |
472 | iif = *(int *)RTA_DATA (tb[RTA_IIF]); | |
473 | ||
474 | if (tb[RTA_SRC]) | |
e3be0432 | 475 | m->sg.src = *(struct in_addr *)RTA_DATA (tb[RTA_SRC]); |
90d82769 DS |
476 | |
477 | if (tb[RTA_DST]) | |
e3be0432 | 478 | m->sg.grp = *(struct in_addr *)RTA_DATA (tb[RTA_DST]); |
90d82769 | 479 | |
113db945 | 480 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) |
e3be0432 | 481 | m->lastused = *(unsigned long long *)RTA_DATA (tb[RTA_EXPIRES]); |
90d82769 DS |
482 | |
483 | if (tb[RTA_MULTIPATH]) | |
484 | { | |
485 | struct rtnexthop *rtnh = | |
486 | (struct rtnexthop *)RTA_DATA (tb[RTA_MULTIPATH]); | |
487 | ||
488 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
489 | for (;;) | |
490 | { | |
491 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) | |
492 | break; | |
493 | ||
494 | oif[oif_count] = rtnh->rtnh_ifindex; | |
495 | oif_count++; | |
496 | ||
497 | len -= NLMSG_ALIGN (rtnh->rtnh_len); | |
498 | rtnh = RTNH_NEXT (rtnh); | |
499 | } | |
500 | } | |
501 | ||
502 | if (IS_ZEBRA_DEBUG_KERNEL) | |
503 | { | |
82d64e8e | 504 | struct interface *ifp; |
e3be0432 DS |
505 | strcpy (sbuf, inet_ntoa (m->sg.src)); |
506 | strcpy (gbuf, inet_ntoa (m->sg.grp)); | |
90d82769 DS |
507 | for (count = 0; count < oif_count; count++) |
508 | { | |
7e2b7603 | 509 | ifp = if_lookup_by_index (oif[count], vrf); |
90d82769 DS |
510 | char temp[256]; |
511 | ||
512 | sprintf (temp, "%s ", ifp->name); | |
513 | strcat (oif_list, temp); | |
514 | } | |
7e2b7603 | 515 | ifp = if_lookup_by_index (iif, vrf); |
82d64e8e DS |
516 | zlog_debug ("MCAST %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", |
517 | nl_msg_type_to_str(h->nlmsg_type), sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 518 | } |
565fdc75 DS |
519 | return 0; |
520 | } | |
521 | ||
522 | int | |
523 | netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h, | |
936ebf0a | 524 | ns_id_t ns_id, int startup) |
565fdc75 DS |
525 | { |
526 | int len; | |
527 | vrf_id_t vrf_id = ns_id; | |
528 | struct rtmsg *rtm; | |
529 | ||
530 | rtm = NLMSG_DATA (h); | |
531 | ||
532 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) | |
533 | { | |
534 | /* If this is not route add/delete message print warning. */ | |
535 | zlog_warn ("Kernel message: %d vrf %u\n", h->nlmsg_type, vrf_id); | |
536 | return 0; | |
537 | } | |
538 | ||
539 | /* Connected route. */ | |
540 | if (IS_ZEBRA_DEBUG_KERNEL) | |
541 | zlog_debug ("%s %s %s proto %s vrf %u", | |
90d82769 DS |
542 | nl_msg_type_to_str (h->nlmsg_type), |
543 | nl_family_to_str (rtm->rtm_family), | |
544 | nl_rttype_to_str (rtm->rtm_type), | |
565fdc75 | 545 | nl_rtproto_to_str (rtm->rtm_protocol), |
90d82769 | 546 | vrf_id); |
565fdc75 DS |
547 | |
548 | /* We don't care about change notifications for the MPLS table. */ | |
549 | /* TODO: Revisit this. */ | |
550 | if (rtm->rtm_family == AF_MPLS) | |
551 | return 0; | |
552 | ||
553 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); | |
554 | if (len < 0) | |
555 | return -1; | |
556 | ||
557 | switch (rtm->rtm_type) | |
558 | { | |
559 | case RTN_UNICAST: | |
936ebf0a | 560 | netlink_route_change_read_unicast (snl, h, ns_id, startup); |
565fdc75 DS |
561 | break; |
562 | case RTN_MULTICAST: | |
936ebf0a | 563 | netlink_route_change_read_multicast (snl, h, ns_id, startup); |
565fdc75 DS |
564 | break; |
565 | default: | |
566 | return 0; | |
567 | break; | |
568 | } | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
718e3744 | 573 | /* Routing table read function using netlink interface. Only called |
574 | bootstrap time. */ | |
575 | int | |
12f6fb97 | 576 | netlink_route_read (struct zebra_ns *zns) |
718e3744 | 577 | { |
578 | int ret; | |
7021c425 | 579 | |
718e3744 | 580 | /* Get IPv4 routing table. */ |
12f6fb97 | 581 | ret = netlink_request (AF_INET, RTM_GETROUTE, &zns->netlink_cmd); |
718e3744 | 582 | if (ret < 0) |
583 | return ret; | |
89a9069a | 584 | ret = netlink_parse_info (netlink_route_change_read_unicast, &zns->netlink_cmd, zns, 0, 1); |
718e3744 | 585 | if (ret < 0) |
586 | return ret; | |
587 | ||
718e3744 | 588 | /* Get IPv6 routing table. */ |
12f6fb97 | 589 | ret = netlink_request (AF_INET6, RTM_GETROUTE, &zns->netlink_cmd); |
718e3744 | 590 | if (ret < 0) |
591 | return ret; | |
89a9069a | 592 | ret = netlink_parse_info (netlink_route_change_read_unicast, &zns->netlink_cmd, zns, 0, 1); |
718e3744 | 593 | if (ret < 0) |
594 | return ret; | |
718e3744 | 595 | |
596 | return 0; | |
597 | } | |
598 | ||
40c7bdb0 | 599 | static void |
600 | _netlink_route_nl_add_gateway_info (u_char route_family, u_char gw_family, | |
601 | struct nlmsghdr *nlmsg, | |
602 | size_t req_size, int bytelen, | |
603 | struct nexthop *nexthop) | |
604 | { | |
605 | if (route_family == AF_MPLS) | |
606 | { | |
607 | struct gw_family_t gw_fam; | |
608 | ||
609 | gw_fam.family = gw_family; | |
610 | if (gw_family == AF_INET) | |
611 | memcpy (&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
612 | else | |
613 | memcpy (&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
614 | addattr_l (nlmsg, req_size, RTA_VIA, &gw_fam.family, bytelen+2); | |
615 | } | |
616 | else | |
617 | { | |
618 | if (gw_family == AF_INET) | |
619 | addattr_l (nlmsg, req_size, RTA_GATEWAY, &nexthop->gate.ipv4, bytelen); | |
620 | else | |
621 | addattr_l (nlmsg, req_size, RTA_GATEWAY, &nexthop->gate.ipv6, bytelen); | |
622 | } | |
623 | } | |
624 | ||
625 | static void | |
626 | _netlink_route_rta_add_gateway_info (u_char route_family, u_char gw_family, | |
627 | struct rtattr *rta, struct rtnexthop *rtnh, | |
628 | size_t req_size, int bytelen, | |
629 | struct nexthop *nexthop) | |
630 | { | |
631 | if (route_family == AF_MPLS) | |
632 | { | |
633 | struct gw_family_t gw_fam; | |
634 | ||
635 | gw_fam.family = gw_family; | |
636 | if (gw_family == AF_INET) | |
637 | memcpy (&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
638 | else | |
639 | memcpy (&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
640 | rta_addattr_l (rta, req_size, RTA_VIA, &gw_fam.family, bytelen+2); | |
641 | rtnh->rtnh_len += RTA_LENGTH (bytelen + 2); | |
642 | } | |
643 | else | |
644 | { | |
645 | if (gw_family == AF_INET) | |
646 | rta_addattr_l (rta, req_size, RTA_GATEWAY, &nexthop->gate.ipv4, bytelen); | |
647 | else | |
648 | rta_addattr_l (rta, req_size, RTA_GATEWAY, &nexthop->gate.ipv6, bytelen); | |
649 | rtnh->rtnh_len += sizeof (struct rtattr) + bytelen; | |
650 | } | |
651 | } | |
652 | ||
fa713d9e CF |
653 | /* This function takes a nexthop as argument and adds |
654 | * the appropriate netlink attributes to an existing | |
655 | * netlink message. | |
656 | * | |
657 | * @param routedesc: Human readable description of route type | |
658 | * (direct/recursive, single-/multipath) | |
659 | * @param bytelen: Length of addresses in bytes. | |
660 | * @param nexthop: Nexthop information | |
661 | * @param nlmsg: nlmsghdr structure to fill in. | |
662 | * @param req_size: The size allocated for the message. | |
663 | */ | |
664 | static void | |
665 | _netlink_route_build_singlepath( | |
666 | const char *routedesc, | |
667 | int bytelen, | |
668 | struct nexthop *nexthop, | |
669 | struct nlmsghdr *nlmsg, | |
e8d3d299 | 670 | struct rtmsg *rtmsg, |
c52ef59f DS |
671 | size_t req_size, |
672 | int cmd) | |
fa713d9e | 673 | { |
c0f4be83 | 674 | struct nexthop_label *nh_label; |
675 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
40c7bdb0 | 676 | char label_buf[100]; |
5c610faf DS |
677 | |
678 | if (rtmsg->rtm_family == AF_INET && | |
679 | (nexthop->type == NEXTHOP_TYPE_IPV6 | |
5c610faf DS |
680 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) |
681 | { | |
682 | char buf[16] = "169.254.0.1"; | |
683 | struct in_addr ipv4_ll; | |
684 | ||
685 | inet_pton (AF_INET, buf, &ipv4_ll); | |
686 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
687 | addattr_l (nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
688 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
689 | ||
fb5d585c | 690 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) |
691 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
692 | &nexthop->rmap_src.ipv4, bytelen); | |
693 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
694 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
695 | &nexthop->src.ipv4, bytelen); | |
696 | ||
5c610faf DS |
697 | if (IS_ZEBRA_DEBUG_KERNEL) |
698 | zlog_debug(" 5549: _netlink_route_build_singlepath() (%s): " | |
699 | "nexthop via %s if %u", | |
700 | routedesc, buf, nexthop->ifindex); | |
701 | return; | |
702 | } | |
703 | ||
40c7bdb0 | 704 | label_buf[0] = '\0'; |
c0f4be83 | 705 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP |
706 | * (in the case of LER) | |
707 | */ | |
708 | nh_label = nexthop->nh_label; | |
40c7bdb0 | 709 | if (rtmsg->rtm_family == AF_MPLS) |
710 | { | |
c0f4be83 | 711 | assert (nh_label); |
712 | assert (nh_label->num_labels == 1); | |
713 | } | |
40c7bdb0 | 714 | |
c0f4be83 | 715 | if (nh_label && nh_label->num_labels) |
716 | { | |
717 | int i, num_labels = 0; | |
718 | u_int32_t bos; | |
719 | char label_buf1[20]; | |
e52702f2 | 720 | |
c0f4be83 | 721 | for (i = 0; i < nh_label->num_labels; i++) |
40c7bdb0 | 722 | { |
c0f4be83 | 723 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) |
724 | { | |
725 | bos = ((i == (nh_label->num_labels - 1)) ? 1 : 0); | |
726 | out_lse[i] = mpls_lse_encode (nh_label->label[i], 0, 0, bos); | |
727 | if (!num_labels) | |
728 | sprintf (label_buf, "label %d", nh_label->label[i]); | |
729 | else | |
730 | { | |
731 | sprintf (label_buf1, "/%d", nh_label->label[i]); | |
732 | strcat (label_buf, label_buf1); | |
733 | } | |
734 | num_labels++; | |
735 | } | |
736 | } | |
737 | if (num_labels) | |
738 | { | |
739 | if (rtmsg->rtm_family == AF_MPLS) | |
740 | addattr_l (nlmsg, req_size, RTA_NEWDST, | |
741 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
742 | else | |
743 | { | |
744 | struct rtattr *nest; | |
745 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
746 | ||
747 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, | |
748 | &encap, sizeof (u_int16_t)); | |
749 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); | |
750 | addattr_l (nlmsg, req_size, MPLS_IPTUNNEL_DST, | |
751 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
752 | addattr_nest_end(nlmsg, nest); | |
753 | } | |
40c7bdb0 | 754 | } |
755 | } | |
756 | ||
e8d3d299 CF |
757 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
758 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
5c610faf | 759 | |
fa713d9e CF |
760 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
761 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
762 | { | |
659b52a8 DS |
763 | /* Send deletes to the kernel without specifying the next-hop */ |
764 | if (cmd != RTM_DELROUTE) | |
765 | _netlink_route_nl_add_gateway_info (rtmsg->rtm_family, AF_INET, nlmsg, | |
766 | req_size, bytelen, nexthop); | |
c52ef59f | 767 | |
0aabccc0 DD |
768 | if (cmd == RTM_NEWROUTE) |
769 | { | |
770 | if (nexthop->rmap_src.ipv4.s_addr) | |
771 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
772 | &nexthop->rmap_src.ipv4, bytelen); | |
773 | else if (nexthop->src.ipv4.s_addr) | |
774 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
775 | &nexthop->src.ipv4, bytelen); | |
776 | } | |
fa713d9e CF |
777 | |
778 | if (IS_ZEBRA_DEBUG_KERNEL) | |
779 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 780 | "nexthop via %s %s if %u", |
fa713d9e CF |
781 | routedesc, |
782 | inet_ntoa (nexthop->gate.ipv4), | |
40c7bdb0 | 783 | label_buf, nexthop->ifindex); |
fa713d9e | 784 | } |
fa713d9e | 785 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
fa713d9e CF |
786 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
787 | { | |
40c7bdb0 | 788 | _netlink_route_nl_add_gateway_info (rtmsg->rtm_family, AF_INET6, nlmsg, |
789 | req_size, bytelen, nexthop); | |
fa713d9e | 790 | |
0aabccc0 DD |
791 | if (cmd == RTM_NEWROUTE) |
792 | { | |
793 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
794 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
795 | &nexthop->rmap_src.ipv6, bytelen); | |
796 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
797 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
798 | &nexthop->src.ipv6, bytelen); | |
799 | } | |
800 | ||
fa713d9e CF |
801 | if (IS_ZEBRA_DEBUG_KERNEL) |
802 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 803 | "nexthop via %s %s if %u", |
fa713d9e CF |
804 | routedesc, |
805 | inet6_ntoa (nexthop->gate.ipv6), | |
40c7bdb0 | 806 | label_buf, nexthop->ifindex); |
fa713d9e | 807 | } |
fa713d9e | 808 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
fa713d9e CF |
809 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
810 | { | |
811 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
812 | ||
0aabccc0 DD |
813 | if (cmd == RTM_NEWROUTE) |
814 | { | |
815 | if (nexthop->rmap_src.ipv4.s_addr) | |
816 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
817 | &nexthop->rmap_src.ipv4, bytelen); | |
818 | else if (nexthop->src.ipv4.s_addr) | |
819 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
820 | &nexthop->src.ipv4, bytelen); | |
821 | } | |
fa713d9e CF |
822 | |
823 | if (IS_ZEBRA_DEBUG_KERNEL) | |
824 | zlog_debug("netlink_route_multipath() (%s): " | |
825 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
826 | } | |
827 | ||
3ee39b5b | 828 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
fa713d9e CF |
829 | { |
830 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
831 | ||
0aabccc0 DD |
832 | if (cmd == RTM_NEWROUTE) |
833 | { | |
834 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
835 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
836 | &nexthop->rmap_src.ipv6, bytelen); | |
837 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
838 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
839 | &nexthop->src.ipv6, bytelen); | |
840 | } | |
841 | ||
fa713d9e CF |
842 | if (IS_ZEBRA_DEBUG_KERNEL) |
843 | zlog_debug("netlink_route_multipath() (%s): " | |
844 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
845 | } | |
846 | } | |
847 | ||
848 | /* This function takes a nexthop as argument and | |
849 | * appends to the given rtattr/rtnexthop pair the | |
850 | * representation of the nexthop. If the nexthop | |
851 | * defines a preferred source, the src parameter | |
852 | * will be modified to point to that src, otherwise | |
853 | * it will be kept unmodified. | |
854 | * | |
855 | * @param routedesc: Human readable description of route type | |
856 | * (direct/recursive, single-/multipath) | |
857 | * @param bytelen: Length of addresses in bytes. | |
858 | * @param nexthop: Nexthop information | |
859 | * @param rta: rtnetlink attribute structure | |
860 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
861 | * @param src: pointer pointing to a location where | |
862 | * the prefsrc should be stored. | |
863 | */ | |
864 | static void | |
865 | _netlink_route_build_multipath( | |
866 | const char *routedesc, | |
867 | int bytelen, | |
868 | struct nexthop *nexthop, | |
869 | struct rtattr *rta, | |
870 | struct rtnexthop *rtnh, | |
5c610faf DS |
871 | struct rtmsg *rtmsg, |
872 | union g_addr **src) | |
fa713d9e | 873 | { |
c0f4be83 | 874 | struct nexthop_label *nh_label; |
875 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
40c7bdb0 | 876 | char label_buf[100]; |
877 | ||
fa713d9e CF |
878 | rtnh->rtnh_len = sizeof (*rtnh); |
879 | rtnh->rtnh_flags = 0; | |
880 | rtnh->rtnh_hops = 0; | |
881 | rta->rta_len += rtnh->rtnh_len; | |
882 | ||
5c610faf DS |
883 | if (rtmsg->rtm_family == AF_INET && |
884 | (nexthop->type == NEXTHOP_TYPE_IPV6 | |
5c610faf DS |
885 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) |
886 | { | |
887 | char buf[16] = "169.254.0.1"; | |
888 | struct in_addr ipv4_ll; | |
889 | ||
890 | inet_pton (AF_INET, buf, &ipv4_ll); | |
891 | bytelen = 4; | |
892 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
893 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, | |
894 | &ipv4_ll, bytelen); | |
895 | rtnh->rtnh_len += sizeof (struct rtattr) + bytelen; | |
896 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
897 | ||
fb5d585c | 898 | if (nexthop->rmap_src.ipv4.s_addr) |
899 | *src = &nexthop->rmap_src; | |
900 | else if (nexthop->src.ipv4.s_addr) | |
901 | *src = &nexthop->src; | |
902 | ||
5c610faf DS |
903 | if (IS_ZEBRA_DEBUG_KERNEL) |
904 | zlog_debug(" 5549: netlink_route_build_multipath() (%s): " | |
905 | "nexthop via %s if %u", | |
906 | routedesc, buf, nexthop->ifindex); | |
907 | return; | |
908 | } | |
909 | ||
40c7bdb0 | 910 | label_buf[0] = '\0'; |
c0f4be83 | 911 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP |
912 | * (in the case of LER) | |
913 | */ | |
914 | nh_label = nexthop->nh_label; | |
40c7bdb0 | 915 | if (rtmsg->rtm_family == AF_MPLS) |
916 | { | |
c0f4be83 | 917 | assert (nh_label); |
918 | assert (nh_label->num_labels == 1); | |
919 | } | |
920 | ||
921 | if (nh_label && nh_label->num_labels) | |
922 | { | |
923 | int i, num_labels = 0; | |
924 | u_int32_t bos; | |
925 | char label_buf1[20]; | |
40c7bdb0 | 926 | |
c0f4be83 | 927 | for (i = 0; i < nh_label->num_labels; i++) |
40c7bdb0 | 928 | { |
c0f4be83 | 929 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) |
930 | { | |
931 | bos = ((i == (nh_label->num_labels - 1)) ? 1 : 0); | |
932 | out_lse[i] = mpls_lse_encode (nh_label->label[i], 0, 0, bos); | |
933 | if (!num_labels) | |
934 | sprintf (label_buf, "label %d", nh_label->label[i]); | |
935 | else | |
936 | { | |
937 | sprintf (label_buf1, "/%d", nh_label->label[i]); | |
938 | strcat (label_buf, label_buf1); | |
939 | } | |
940 | num_labels++; | |
941 | } | |
942 | } | |
943 | if (num_labels) | |
944 | { | |
945 | if (rtmsg->rtm_family == AF_MPLS) | |
946 | { | |
947 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
948 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
949 | rtnh->rtnh_len += RTA_LENGTH (num_labels * sizeof(mpls_lse_t)); | |
950 | } | |
951 | else | |
952 | { | |
953 | struct rtattr *nest; | |
954 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
955 | int len = rta->rta_len; | |
956 | ||
957 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_ENCAP_TYPE, | |
958 | &encap, sizeof (u_int16_t)); | |
959 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, RTA_ENCAP); | |
960 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, MPLS_IPTUNNEL_DST, | |
961 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
962 | rta_nest_end(rta, nest); | |
963 | rtnh->rtnh_len += rta->rta_len - len; | |
964 | } | |
40c7bdb0 | 965 | } |
966 | } | |
5c610faf | 967 | |
e8d3d299 CF |
968 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
969 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
970 | ||
fa713d9e CF |
971 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
972 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
973 | { | |
40c7bdb0 | 974 | _netlink_route_rta_add_gateway_info (rtmsg->rtm_family, AF_INET, rta, |
975 | rtnh, NL_PKT_BUF_SIZE, bytelen, nexthop); | |
c52ef59f DS |
976 | if (nexthop->rmap_src.ipv4.s_addr) |
977 | *src = &nexthop->rmap_src; | |
978 | else if (nexthop->src.ipv4.s_addr) | |
979 | *src = &nexthop->src; | |
fa713d9e CF |
980 | |
981 | if (IS_ZEBRA_DEBUG_KERNEL) | |
982 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 983 | "nexthop via %s %s if %u", |
fa713d9e CF |
984 | routedesc, |
985 | inet_ntoa (nexthop->gate.ipv4), | |
40c7bdb0 | 986 | label_buf, nexthop->ifindex); |
fa713d9e | 987 | } |
fa713d9e | 988 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
fa713d9e CF |
989 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
990 | { | |
40c7bdb0 | 991 | _netlink_route_rta_add_gateway_info (rtmsg->rtm_family, AF_INET6, rta, |
992 | rtnh, NL_PKT_BUF_SIZE, bytelen, nexthop); | |
0aabccc0 DD |
993 | |
994 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
995 | *src = &nexthop->rmap_src; | |
996 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
997 | *src = &nexthop->src; | |
998 | ||
fa713d9e CF |
999 | if (IS_ZEBRA_DEBUG_KERNEL) |
1000 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 1001 | "nexthop via %s %s if %u", |
fa713d9e CF |
1002 | routedesc, |
1003 | inet6_ntoa (nexthop->gate.ipv6), | |
40c7bdb0 | 1004 | label_buf, nexthop->ifindex); |
fa713d9e | 1005 | } |
fa713d9e CF |
1006 | /* ifindex */ |
1007 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
3ee39b5b | 1008 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) |
fa713d9e CF |
1009 | { |
1010 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
c52ef59f DS |
1011 | |
1012 | if (nexthop->rmap_src.ipv4.s_addr) | |
1013 | *src = &nexthop->rmap_src; | |
1014 | else if (nexthop->src.ipv4.s_addr) | |
fa713d9e | 1015 | *src = &nexthop->src; |
c52ef59f | 1016 | |
fa713d9e CF |
1017 | if (IS_ZEBRA_DEBUG_KERNEL) |
1018 | zlog_debug("netlink_route_multipath() (%s): " | |
1019 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
1020 | } | |
3ee39b5b | 1021 | else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
fa713d9e CF |
1022 | { |
1023 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1024 | ||
1025 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1026 | zlog_debug("netlink_route_multipath() (%s): " | |
1027 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
1028 | } | |
1029 | else | |
1030 | { | |
1031 | rtnh->rtnh_ifindex = 0; | |
1032 | } | |
1033 | } | |
1034 | ||
40c7bdb0 | 1035 | static inline void |
1036 | _netlink_mpls_build_singlepath( | |
1037 | const char *routedesc, | |
1038 | zebra_nhlfe_t *nhlfe, | |
1039 | struct nlmsghdr *nlmsg, | |
1040 | struct rtmsg *rtmsg, | |
1041 | size_t req_size, | |
1042 | int cmd) | |
1043 | { | |
1044 | int bytelen; | |
1045 | u_char family; | |
1046 | ||
1047 | family = NHLFE_FAMILY (nhlfe); | |
1048 | bytelen = (family == AF_INET ? 4 : 16); | |
1049 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1050 | nlmsg, rtmsg, req_size, cmd); | |
1051 | } | |
1052 | ||
1053 | ||
1054 | static inline void | |
1055 | _netlink_mpls_build_multipath( | |
1056 | const char *routedesc, | |
1057 | zebra_nhlfe_t *nhlfe, | |
1058 | struct rtattr *rta, | |
1059 | struct rtnexthop *rtnh, | |
1060 | struct rtmsg *rtmsg, | |
1061 | union g_addr **src) | |
1062 | { | |
1063 | int bytelen; | |
1064 | u_char family; | |
1065 | ||
1066 | family = NHLFE_FAMILY (nhlfe); | |
1067 | bytelen = (family == AF_INET ? 4 : 16); | |
1068 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, | |
1069 | rta, rtnh, rtmsg, src); | |
1070 | } | |
1071 | ||
1072 | ||
fa713d9e CF |
1073 | /* Log debug information for netlink_route_multipath |
1074 | * if debug logging is enabled. | |
1075 | * | |
1076 | * @param cmd: Netlink command which is to be processed | |
1077 | * @param p: Prefix for which the change is due | |
1078 | * @param nexthop: Nexthop which is currently processed | |
1079 | * @param routedesc: Semantic annotation for nexthop | |
1080 | * (recursive, multipath, etc.) | |
1081 | * @param family: Address family which the change concerns | |
1082 | */ | |
1083 | static void | |
1084 | _netlink_route_debug( | |
1085 | int cmd, | |
1086 | struct prefix *p, | |
1087 | struct nexthop *nexthop, | |
1088 | const char *routedesc, | |
8f7d9fc0 FL |
1089 | int family, |
1090 | struct zebra_vrf *zvrf) | |
fa713d9e CF |
1091 | { |
1092 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1093 | { | |
35d921cc TT |
1094 | char buf[PREFIX_STRLEN]; |
1095 | zlog_debug ("netlink_route_multipath() (%s): %s %s vrf %u type %s", | |
1096 | routedesc, | |
1fdc9eae | 1097 | nl_msg_type_to_str (cmd), |
661512bf | 1098 | prefix2str (p, buf, sizeof(buf)), zvrf_id (zvrf), |
40c7bdb0 | 1099 | (nexthop) ? nexthop_type_to_str (nexthop->type) : "UNK"); |
fa713d9e | 1100 | } |
e52702f2 | 1101 | } |
fa713d9e | 1102 | |
40c7bdb0 | 1103 | static void |
1104 | _netlink_mpls_debug( | |
1105 | int cmd, | |
1106 | u_int32_t label, | |
1107 | const char *routedesc) | |
1108 | { | |
1109 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1110 | zlog_debug ("netlink_mpls_multipath() (%s): %s %u/20", | |
1fdc9eae | 1111 | routedesc, nl_msg_type_to_str (cmd), label); |
fa713d9e CF |
1112 | } |
1113 | ||
6b8a5694 | 1114 | static int |
1bb6e9b7 | 1115 | netlink_neigh_update (int cmd, int ifindex, uint32_t addr, char *lla, int llalen) |
5c610faf DS |
1116 | { |
1117 | struct { | |
1118 | struct nlmsghdr n; | |
1119 | struct ndmsg ndm; | |
1120 | char buf[256]; | |
1121 | } req; | |
1122 | ||
fe18ee2d | 1123 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); |
8f7d9fc0 | 1124 | |
5c610faf DS |
1125 | memset(&req.n, 0, sizeof(req.n)); |
1126 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1127 | ||
1128 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1129 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1130 | req.n.nlmsg_type = cmd; //RTM_NEWNEIGH or RTM_DELNEIGH | |
1131 | req.ndm.ndm_family = AF_INET; | |
1132 | req.ndm.ndm_state = NUD_PERMANENT; | |
1133 | req.ndm.ndm_ifindex = ifindex; | |
1134 | req.ndm.ndm_type = RTN_UNICAST; | |
1135 | ||
1136 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); | |
1137 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
1138 | ||
936ebf0a | 1139 | return netlink_talk (netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, 0); |
5c610faf DS |
1140 | } |
1141 | ||
718e3744 | 1142 | /* Routing table change via netlink interface. */ |
6ae24471 | 1143 | /* Update flag indicates whether this is a "replace" or not. */ |
6072b24e | 1144 | static int |
05737783 CF |
1145 | netlink_route_multipath (int cmd, struct prefix *p, struct prefix *src_p, |
1146 | struct rib *rib, int update) | |
718e3744 | 1147 | { |
1148 | int bytelen; | |
1149 | struct sockaddr_nl snl; | |
fa713d9e CF |
1150 | struct nexthop *nexthop = NULL, *tnexthop; |
1151 | int recursing; | |
37fe7731 | 1152 | unsigned int nexthop_num; |
718e3744 | 1153 | int discard; |
be717a0a | 1154 | int family = PREFIX_FAMILY(p); |
fa713d9e | 1155 | const char *routedesc; |
c52ef59f DS |
1156 | int setsrc = 0; |
1157 | union g_addr src; | |
718e3744 | 1158 | |
7021c425 | 1159 | struct |
718e3744 | 1160 | { |
1161 | struct nlmsghdr n; | |
1162 | struct rtmsg r; | |
3cadc0cd | 1163 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 1164 | } req; |
1165 | ||
fe18ee2d | 1166 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); |
8f7d9fc0 FL |
1167 | struct zebra_vrf *zvrf = vrf_info_lookup (rib->vrf_id); |
1168 | ||
a4c06dec | 1169 | memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE); |
718e3744 | 1170 | |
1171 | bytelen = (family == AF_INET ? 4 : 16); | |
1172 | ||
1173 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); | |
1174 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
6ae24471 DS |
1175 | if ((cmd == RTM_NEWROUTE) && update) |
1176 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
718e3744 | 1177 | req.n.nlmsg_type = cmd; |
1178 | req.r.rtm_family = family; | |
718e3744 | 1179 | req.r.rtm_dst_len = p->prefixlen; |
05737783 | 1180 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; |
23b1f334 | 1181 | req.r.rtm_protocol = get_rt_proto(rib->type); |
40da2216 | 1182 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
718e3744 | 1183 | |
7021c425 | 1184 | if ((rib->flags & ZEBRA_FLAG_BLACKHOLE) || (rib->flags & ZEBRA_FLAG_REJECT)) |
718e3744 | 1185 | discard = 1; |
1186 | else | |
1187 | discard = 0; | |
1188 | ||
7021c425 | 1189 | if (cmd == RTM_NEWROUTE) |
718e3744 | 1190 | { |
7021c425 | 1191 | if (discard) |
595db7f1 | 1192 | { |
1193 | if (rib->flags & ZEBRA_FLAG_BLACKHOLE) | |
1194 | req.r.rtm_type = RTN_BLACKHOLE; | |
1195 | else if (rib->flags & ZEBRA_FLAG_REJECT) | |
1196 | req.r.rtm_type = RTN_UNREACHABLE; | |
7021c425 | 1197 | else |
1198 | assert (RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ | |
1199 | } | |
595db7f1 | 1200 | else |
7021c425 | 1201 | req.r.rtm_type = RTN_UNICAST; |
718e3744 | 1202 | } |
1203 | ||
1204 | addattr_l (&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); | |
05737783 CF |
1205 | if (src_p) |
1206 | addattr_l (&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, bytelen); | |
718e3744 | 1207 | |
1208 | /* Metric. */ | |
1f5705f0 DS |
1209 | /* Hardcode the metric for all routes coming from zebra. Metric isn't used |
1210 | * either by the kernel or by zebra. Its purely for calculating best path(s) | |
1211 | * by the routing protocol and for communicating with protocol peers. | |
1212 | */ | |
1213 | addattr32 (&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
718e3744 | 1214 | |
ca46a78e | 1215 | /* Table corresponding to this route. */ |
1216 | if (rib->table < 256) | |
1217 | req.r.rtm_table = rib->table; | |
1218 | else | |
1219 | { | |
1220 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1221 | addattr32(&req.n, sizeof req, RTA_TABLE, rib->table); | |
1222 | } | |
1223 | ||
c50ca33a TT |
1224 | if (rib->mtu || rib->nexthop_mtu) |
1225 | { | |
1226 | char buf[NL_PKT_BUF_SIZE]; | |
1227 | struct rtattr *rta = (void *) buf; | |
1228 | u_int32_t mtu = rib->mtu; | |
1229 | if (!mtu || (rib->nexthop_mtu && rib->nexthop_mtu < mtu)) | |
1230 | mtu = rib->nexthop_mtu; | |
1231 | rta->rta_type = RTA_METRICS; | |
1232 | rta->rta_len = RTA_LENGTH(0); | |
1233 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1234 | addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA (rta), | |
1235 | RTA_PAYLOAD (rta)); | |
1236 | } | |
1237 | ||
718e3744 | 1238 | if (discard) |
1239 | { | |
1240 | if (cmd == RTM_NEWROUTE) | |
fa713d9e CF |
1241 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
1242 | { | |
1243 | /* We shouldn't encounter recursive nexthops on discard routes, | |
1244 | * but it is probably better to handle that case correctly anyway. | |
1245 | */ | |
1246 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1247 | continue; | |
fa713d9e | 1248 | } |
718e3744 | 1249 | goto skip; |
1250 | } | |
1251 | ||
fa713d9e CF |
1252 | /* Count overall nexthops so we can decide whether to use singlepath |
1253 | * or multipath case. */ | |
1254 | nexthop_num = 0; | |
1255 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1256 | { | |
1257 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1258 | continue; | |
1259 | if (cmd == RTM_NEWROUTE && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1260 | continue; | |
1261 | if (cmd == RTM_DELROUTE && !CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1262 | continue; | |
1263 | ||
1264 | nexthop_num++; | |
1265 | } | |
1266 | ||
1267 | /* Singlepath case. */ | |
37fe7731 | 1268 | if (nexthop_num == 1 || multipath_num == 1) |
718e3744 | 1269 | { |
fa713d9e CF |
1270 | nexthop_num = 0; |
1271 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
7021c425 | 1272 | { |
fa713d9e | 1273 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
c52ef59f | 1274 | { |
c52ef59f DS |
1275 | if (!setsrc) |
1276 | { | |
0aabccc0 DD |
1277 | if (family == AF_INET) |
1278 | { | |
1279 | if (nexthop->rmap_src.ipv4.s_addr != 0) | |
1280 | { | |
1281 | src.ipv4 = nexthop->rmap_src.ipv4; | |
1282 | setsrc = 1; | |
1283 | } | |
1284 | else if (nexthop->src.ipv4.s_addr != 0) | |
1285 | { | |
1286 | src.ipv4 = nexthop->src.ipv4; | |
1287 | setsrc = 1; | |
1288 | } | |
1289 | } | |
1290 | else if (family == AF_INET6) | |
1291 | { | |
1292 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1293 | { | |
1294 | src.ipv6 = nexthop->rmap_src.ipv6; | |
1295 | setsrc = 1; | |
1296 | } | |
1297 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1298 | { | |
1299 | src.ipv6 = nexthop->src.ipv6; | |
1300 | setsrc = 1; | |
1301 | } | |
1302 | } | |
c52ef59f DS |
1303 | } |
1304 | continue; | |
1305 | } | |
7021c425 | 1306 | |
1307 | if ((cmd == RTM_NEWROUTE | |
1308 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1309 | || (cmd == RTM_DELROUTE | |
1310 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) | |
1311 | { | |
fa713d9e | 1312 | routedesc = recursing ? "recursive, 1 hop" : "single hop"; |
7021c425 | 1313 | |
8f7d9fc0 | 1314 | _netlink_route_debug(cmd, p, nexthop, routedesc, family, zvrf); |
fa713d9e | 1315 | _netlink_route_build_singlepath(routedesc, bytelen, |
e8d3d299 | 1316 | nexthop, &req.n, &req.r, |
c52ef59f | 1317 | sizeof req, cmd); |
7021c425 | 1318 | nexthop_num++; |
1319 | break; | |
1320 | } | |
1321 | } | |
c52ef59f | 1322 | if (setsrc && (cmd == RTM_NEWROUTE)) |
0aabccc0 DD |
1323 | { |
1324 | if (family == AF_INET) | |
1325 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv4, bytelen); | |
1326 | else if (family == AF_INET6) | |
1327 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv6, bytelen); | |
1328 | } | |
718e3744 | 1329 | } |
1330 | else | |
1331 | { | |
3cadc0cd | 1332 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 1333 | struct rtattr *rta = (void *) buf; |
1334 | struct rtnexthop *rtnh; | |
c52ef59f | 1335 | union g_addr *src1 = NULL; |
718e3744 | 1336 | |
1337 | rta->rta_type = RTA_MULTIPATH; | |
7021c425 | 1338 | rta->rta_len = RTA_LENGTH (0); |
1339 | rtnh = RTA_DATA (rta); | |
718e3744 | 1340 | |
1341 | nexthop_num = 0; | |
fa713d9e | 1342 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
7021c425 | 1343 | { |
37fe7731 | 1344 | if (nexthop_num >= multipath_num) |
fa713d9e CF |
1345 | break; |
1346 | ||
1347 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
c52ef59f DS |
1348 | { |
1349 | /* This only works for IPv4 now */ | |
1350 | if (!setsrc) | |
1351 | { | |
0aabccc0 DD |
1352 | if (family == AF_INET) |
1353 | { | |
1354 | if (nexthop->rmap_src.ipv4.s_addr != 0) | |
1355 | { | |
1356 | src.ipv4 = nexthop->rmap_src.ipv4; | |
1357 | setsrc = 1; | |
1358 | } | |
1359 | else if (nexthop->src.ipv4.s_addr != 0) | |
1360 | { | |
1361 | src.ipv4 = nexthop->src.ipv4; | |
1362 | setsrc = 1; | |
1363 | } | |
1364 | } | |
1365 | else if (family == AF_INET6) | |
1366 | { | |
1367 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1368 | { | |
1369 | src.ipv6 = nexthop->rmap_src.ipv6; | |
1370 | setsrc = 1; | |
1371 | } | |
1372 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1373 | { | |
1374 | src.ipv6 = nexthop->src.ipv6; | |
1375 | setsrc = 1; | |
1376 | } | |
1377 | } | |
c52ef59f DS |
1378 | } |
1379 | continue; | |
1380 | } | |
fa713d9e | 1381 | |
7021c425 | 1382 | if ((cmd == RTM_NEWROUTE |
1383 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1384 | || (cmd == RTM_DELROUTE | |
1385 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) | |
1386 | { | |
fa713d9e | 1387 | routedesc = recursing ? "recursive, multihop" : "multihop"; |
7021c425 | 1388 | nexthop_num++; |
1389 | ||
fa713d9e | 1390 | _netlink_route_debug(cmd, p, nexthop, |
8f7d9fc0 | 1391 | routedesc, family, zvrf); |
fa713d9e | 1392 | _netlink_route_build_multipath(routedesc, bytelen, |
5c610faf | 1393 | nexthop, rta, rtnh, &req.r, &src1); |
7021c425 | 1394 | rtnh = RTNH_NEXT (rtnh); |
1395 | ||
c52ef59f DS |
1396 | if (!setsrc && src1) |
1397 | { | |
0aabccc0 DD |
1398 | if (family == AF_INET) |
1399 | src.ipv4 = src1->ipv4; | |
1400 | else if (family == AF_INET6) | |
1401 | src.ipv6 = src1->ipv6; | |
1402 | ||
c52ef59f DS |
1403 | setsrc = 1; |
1404 | } | |
7021c425 | 1405 | } |
1406 | } | |
c52ef59f | 1407 | if (setsrc && (cmd == RTM_NEWROUTE)) |
0aabccc0 DD |
1408 | { |
1409 | if (family == AF_INET) | |
1410 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv4, bytelen); | |
1411 | else if (family == AF_INET6) | |
1412 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv6, bytelen); | |
82a95360 DS |
1413 | if (IS_ZEBRA_DEBUG_KERNEL) |
1414 | zlog_debug("Setting source"); | |
0aabccc0 | 1415 | } |
718e3744 | 1416 | |
1417 | if (rta->rta_len > RTA_LENGTH (0)) | |
3cadc0cd | 1418 | addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, RTA_DATA (rta), |
7021c425 | 1419 | RTA_PAYLOAD (rta)); |
718e3744 | 1420 | } |
1421 | ||
1422 | /* If there is no useful nexthop then return. */ | |
1423 | if (nexthop_num == 0) | |
1424 | { | |
1425 | if (IS_ZEBRA_DEBUG_KERNEL) | |
b6178002 | 1426 | zlog_debug ("netlink_route_multipath(): No useful nexthop."); |
718e3744 | 1427 | return 0; |
1428 | } | |
1429 | ||
7021c425 | 1430 | skip: |
718e3744 | 1431 | |
1432 | /* Destination netlink address. */ | |
1433 | memset (&snl, 0, sizeof snl); | |
1434 | snl.nl_family = AF_NETLINK; | |
1435 | ||
718e3744 | 1436 | /* Talk to netlink socket. */ |
936ebf0a | 1437 | return netlink_talk (netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, 0); |
718e3744 | 1438 | } |
1439 | ||
e3be0432 | 1440 | int |
1498c059 | 1441 | kernel_get_ipmr_sg_stats (void *in) |
e3be0432 DS |
1442 | { |
1443 | int suc = 0; | |
1444 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
1445 | struct { | |
1446 | struct nlmsghdr n; | |
1447 | struct ndmsg ndm; | |
1448 | char buf[256]; | |
1449 | } req; | |
1450 | ||
1451 | mroute = mr; | |
1452 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); | |
1453 | ||
1454 | memset(&req.n, 0, sizeof(req.n)); | |
1455 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1456 | ||
1457 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1458 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1459 | req.ndm.ndm_family = AF_INET; | |
1460 | req.n.nlmsg_type = RTM_GETROUTE; | |
1461 | ||
1462 | addattr_l (&req.n, sizeof (req), RTA_IIF, &mroute->ifindex, 4); | |
1463 | addattr_l (&req.n, sizeof (req), RTA_OIF, &mroute->ifindex, 4); | |
1464 | addattr_l (&req.n, sizeof (req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1465 | addattr_l (&req.n, sizeof (req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1466 | ||
936ebf0a | 1467 | suc = netlink_talk (netlink_route_change_read_multicast, &req.n, &zns->netlink_cmd, zns, 0); |
e3be0432 DS |
1468 | |
1469 | mroute = NULL; | |
1470 | return suc; | |
1471 | } | |
1472 | ||
718e3744 | 1473 | int |
05737783 CF |
1474 | kernel_route_rib (struct prefix *p, struct prefix *src_p, |
1475 | struct rib *old, struct rib *new) | |
718e3744 | 1476 | { |
be717a0a | 1477 | if (!old && new) |
05737783 | 1478 | return netlink_route_multipath (RTM_NEWROUTE, p, src_p, new, 0); |
be717a0a | 1479 | if (old && !new) |
05737783 | 1480 | return netlink_route_multipath (RTM_DELROUTE, p, src_p, old, 0); |
718e3744 | 1481 | |
05737783 | 1482 | return netlink_route_multipath (RTM_NEWROUTE, p, src_p, new, 1); |
718e3744 | 1483 | } |
1484 | ||
6b8a5694 RW |
1485 | int |
1486 | kernel_neigh_update (int add, int ifindex, uint32_t addr, char *lla, int llalen) | |
1487 | { | |
1488 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, addr, | |
1489 | lla, llalen); | |
1490 | } | |
718e3744 | 1491 | |
40c7bdb0 | 1492 | /* |
1493 | * MPLS label forwarding table change via netlink interface. | |
1494 | */ | |
be0dba35 | 1495 | int |
40c7bdb0 | 1496 | netlink_mpls_multipath (int cmd, zebra_lsp_t *lsp) |
1497 | { | |
1498 | mpls_lse_t lse; | |
1499 | zebra_nhlfe_t *nhlfe; | |
1500 | struct nexthop *nexthop = NULL; | |
37fe7731 | 1501 | unsigned int nexthop_num; |
40c7bdb0 | 1502 | const char *routedesc; |
1503 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); | |
1504 | ||
1505 | struct | |
1506 | { | |
1507 | struct nlmsghdr n; | |
1508 | struct rtmsg r; | |
1509 | char buf[NL_PKT_BUF_SIZE]; | |
1510 | } req; | |
1511 | ||
1512 | memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
1513 | ||
1514 | ||
1515 | /* | |
1516 | * Count # nexthops so we can decide whether to use singlepath | |
1517 | * or multipath case. | |
1518 | */ | |
1519 | nexthop_num = 0; | |
1520 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1521 | { | |
1522 | nexthop = nhlfe->nexthop; | |
1523 | if (!nexthop) | |
1524 | continue; | |
1525 | if (cmd == RTM_NEWROUTE) | |
1526 | { | |
1527 | /* Count all selected NHLFEs */ | |
1528 | if (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED) && | |
1529 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1530 | nexthop_num++; | |
1531 | } | |
1532 | else /* DEL */ | |
1533 | { | |
1534 | /* Count all installed NHLFEs */ | |
1535 | if (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) && | |
1536 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1537 | nexthop_num++; | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | if (nexthop_num == 0) // unexpected | |
1542 | return 0; | |
1543 | ||
1544 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); | |
1545 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1546 | req.n.nlmsg_type = cmd; | |
1547 | req.r.rtm_family = AF_MPLS; | |
1548 | req.r.rtm_table = RT_TABLE_MAIN; | |
1549 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
1550 | req.r.rtm_protocol = RTPROT_ZEBRA; | |
1551 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
1552 | req.r.rtm_type = RTN_UNICAST; | |
1553 | ||
1554 | if (cmd == RTM_NEWROUTE) | |
1555 | /* We do a replace to handle update. */ | |
1556 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1557 | ||
1558 | /* Fill destination */ | |
1559 | lse = mpls_lse_encode (lsp->ile.in_label, 0, 0, 1); | |
1560 | addattr_l (&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
1561 | ||
1562 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
1563 | * chosen depend on the operation. | |
1564 | */ | |
37fe7731 | 1565 | if (nexthop_num == 1 || multipath_num == 1) |
40c7bdb0 | 1566 | { |
1567 | routedesc = "single hop"; | |
1568 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); | |
1569 | ||
1570 | nexthop_num = 0; | |
1571 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1572 | { | |
1573 | nexthop = nhlfe->nexthop; | |
1574 | if (!nexthop) | |
1575 | continue; | |
1576 | ||
1577 | if ((cmd == RTM_NEWROUTE && | |
1578 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED) && | |
1579 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE))) || | |
1580 | (cmd == RTM_DELROUTE && | |
1581 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) && | |
1582 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)))) | |
1583 | { | |
1584 | /* Add the gateway */ | |
1585 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
1586 | &req.n, &req.r, sizeof req, cmd); | |
1587 | if (cmd == RTM_NEWROUTE) | |
1588 | { | |
1589 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1590 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1591 | } | |
1592 | else | |
1593 | { | |
1594 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1595 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1596 | } | |
1597 | nexthop_num++; | |
1598 | break; | |
1599 | } | |
1600 | } | |
1601 | } | |
1602 | else /* Multipath case */ | |
1603 | { | |
1604 | char buf[NL_PKT_BUF_SIZE]; | |
1605 | struct rtattr *rta = (void *) buf; | |
1606 | struct rtnexthop *rtnh; | |
1607 | union g_addr *src1 = NULL; | |
1608 | ||
1609 | rta->rta_type = RTA_MULTIPATH; | |
1610 | rta->rta_len = RTA_LENGTH (0); | |
1611 | rtnh = RTA_DATA (rta); | |
1612 | ||
1613 | routedesc = "multihop"; | |
1614 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); | |
1615 | ||
1616 | nexthop_num = 0; | |
1617 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1618 | { | |
1619 | nexthop = nhlfe->nexthop; | |
1620 | if (!nexthop) | |
1621 | continue; | |
1622 | ||
37fe7731 | 1623 | if (nexthop_num >= multipath_num) |
40c7bdb0 | 1624 | break; |
1625 | ||
1626 | if ((cmd == RTM_NEWROUTE && | |
1627 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED) && | |
1628 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE))) || | |
1629 | (cmd == RTM_DELROUTE && | |
1630 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) && | |
1631 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)))) | |
1632 | { | |
1633 | nexthop_num++; | |
1634 | ||
1635 | /* Build the multipath */ | |
1636 | _netlink_mpls_build_multipath(routedesc, nhlfe, rta, | |
1637 | rtnh, &req.r, &src1); | |
1638 | rtnh = RTNH_NEXT (rtnh); | |
1639 | ||
1640 | if (cmd == RTM_NEWROUTE) | |
1641 | { | |
1642 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1643 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1644 | } | |
1645 | else | |
1646 | { | |
1647 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1648 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1649 | } | |
1650 | ||
1651 | } | |
1652 | } | |
1653 | ||
1654 | /* Add the multipath */ | |
1655 | if (rta->rta_len > RTA_LENGTH (0)) | |
1656 | addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, RTA_DATA (rta), | |
1657 | RTA_PAYLOAD (rta)); | |
1658 | } | |
1659 | ||
1660 | /* Talk to netlink socket. */ | |
936ebf0a | 1661 | return netlink_talk (netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, 0); |
40c7bdb0 | 1662 | } |
1663 | ||
1664 | /* | |
1665 | * Handle failure in LSP install, clear flags for NHLFE. | |
1666 | */ | |
be0dba35 | 1667 | void |
40c7bdb0 | 1668 | clear_nhlfe_installed (zebra_lsp_t *lsp) |
1669 | { | |
1670 | zebra_nhlfe_t *nhlfe; | |
1671 | struct nexthop *nexthop; | |
1672 | ||
1673 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1674 | { | |
1675 | nexthop = nhlfe->nexthop; | |
1676 | if (!nexthop) | |
1677 | continue; | |
1678 | ||
1679 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1680 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1681 | } | |
1682 | } |